Is "spa" a noun or a verb?

I confess. Lately I've been using the word spa as a verb. I go spa-ing. I get spa-ed. Or is it spaed? I guess we're creating a new spa language here. Yes, a spa is a facility that should provide a variety of "spa returns" - from a delicious, memorable, meaningful spa experience. But I catch myself asking friends if they want to go spaing. What about you?